Alloy



PATENT; OFFICEQ UNITED STATES TA'I SUZO KOSUGI, OF- SEIDO-MURA, KOBE,JAPAN.

Patented Mar. 1,1921.

Application filed June so, 1920. Serial No. 393,209.

Be it known that I, TATSUZO Kosqer, a sub'ect of the Emperor of Japan,residing in eido-mura, county of Muko, Prefecture of Kobe, Japan, haveinvented certain new and useful Improvements in Alloys, of which thefollowing is a specificatlon.

The present invention relates to an alloy 4 comprising copper,aluminium, nickel and melting them by heating,

iron andhas for its object to obtain an alloy having a great tensilestrength, not easlly susceptible of" corrosive action of air or brine.Another object is to obtain an alloy in whichblow holes-and flaws arenot produced by casting and forging operations.

In the present inventlon I use copper in preponderating amount, togetherwith aluminium, nickel and iron.

I first mix nickel and iron in a crucible, and then I add copper to themolten mass. After heating the mixture for a while I add aluminiumthereto. When the whole matter is melted, the molten mass is poured intomolds to form objects of any deslred shape, as in ordinary metalcasting.

Preferably alloys of the quaternary type may contain from one to six percent. iron, two. to seven per cent. nickel, seven to twelve per cent.aluminium, with the balance PPQ I The alloys prepared in this ratio givea tenslle strength as high as 48 tons per square inch, a ductility of25%, always have a homogenelty of structure, no blow holes or flaws willbe produced by any kind 'of treatmerit, such as casting, swaging,rolling, etc.', and they will never rust but permanently retain a goldenluster.

This alloy, having the excellent characteristicsmentioned above, is ofexceptional utillty in its employment for all kinds of Industrial anddomestic purposes, being particularly .adapted to machines; cuttingtools, furniture and decorative articles, and several operating andwearing parts of engines and motors.

propellers, hydraulic aving now particularly described and ascertainedthe nature of my said invention and m what manner the same is to beperformed, I declare that what I claim is 1 A11 alloy,-comprisingseventy-five to'ninety per cent. copper, seven to twelve per cent.aluminium, two to seven per cent. nickel, and one to six percent. iron.

In witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses.

V TATSUZO KOSUGI.

Witnesses:

Hmno KAI, M. W. SMITH.

